feat(agent): агент логов — фильтр, LLM-страж, планировщик grep (#18)

- prefilter: правила из config/agent_rules.yaml (длина, команды, shell,
  секреты и системные файлы, prompt injection) — без LLM
- guard: отдельный вызов, JSON {verdict, reason}; невалидный ответ = attack,
  недоступный LLM — «попробуйте позже», а не атака
- planner: только AgentLogQuery (контейнер из белого списка, ≤ 7 д, шаблон
  ≤ 200 без вложенных квантификаторов, лимит ≤ 500); логи в LLM не идут
- бот: «🤖 Спросить агента» → показывает построенный grep и строки;
  атака — вежливый отказ и 🛡 администраторам; квота 30 в сутки
- журнал agent_requests + log_queries (mode=agent)
- при LLM_PROVIDER=mock агент выключен

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/main.py

@@ -9,6 +9,7 @@ from aiogram.client.session.aiohttp import AiohttpSession
 
 from app import __version__
 from app.access.service import AccessService
+from app.agent.service import Agent
 from app.bot.fsm import make_storage
 from app.bot.middlewares.access import AccessMiddleware
 from app.bot.routers import commit, common, logs, members, status
@@ -17,6 +18,7 @@ from app.db.maintenance import cleanup_loop
 from app.db.migrate import upgrade
 from app.db.session import SessionMaker, make_engine, make_sessionmaker
 from app.health import heartbeat
+from app.llm.factory import make_provider
 from app.logs.journal import LogJournal
 from app.logs_setup import setup_logging
 from app.repo.drafts import DraftService
@@ -38,6 +40,7 @@ def build_dispatcher(
     commit_url_template: str = "",
     docker: DockerClient | None = None,
     checker: Checker | None = None,
+    agent: Agent | None = None,
 ) -> Dispatcher:
     dp = Dispatcher(storage=make_storage(sessions))
     gate = AccessMiddleware(access, texts)
@@ -49,7 +52,7 @@ def build_dispatcher(
         commit.build_router(texts, repo, DraftService(sessions), Publisher(repo, sessions), commit_url_template)
     )
     dp.include_router(status.build_router(texts, docker, checker))
-    dp.include_router(logs.build_router(texts, docker, LogJournal(sessions)))
+    dp.include_router(logs.build_router(texts, docker, LogJournal(sessions), agent, access))
     dp.include_router(common.build_router(texts, access))
     return dp
 
@@ -66,8 +69,11 @@ async def run(settings: Settings) -> None:
     docker = DockerClient(settings.docker) if settings.docker.url else None
     store = SnapshotStore(sessions)
     checker = Checker(docker, store, checks_cfg) if docker else None
+    # The mock provider answers `{}` to the guard — every question would be an «attack»: no real LLM, no agent
+    llm = make_provider(settings.llm) if settings.llm.provider != "mock" else None
+    agent = Agent.from_config(llm, sessions, settings.runtime.config_dir) if llm else None
     dp = build_dispatcher(
-        texts, sessions, access, UploadsRepo(settings.git), settings.git.commit_url_template, docker, checker
+        texts, sessions, access, UploadsRepo(settings.git), settings.git.commit_url_template, docker, checker, agent
     )
     rt = settings.runtime
     background = [
@@ -80,11 +86,12 @@ async def run(settings: Settings) -> None:
     session = AiohttpSession(proxy=proxy.get_secret_value()) if proxy else None
     bot = Bot(settings.telegram.bot_token.get_secret_value(), session=session)
     log.info(
-        "tgit %s starting, %d bootstrap admin(s), telegram %s, docker %s",
+        "tgit %s starting, %d bootstrap admin(s), telegram %s, docker %s, agent %s",
         __version__,
         len(settings.access.admin_ids),
         "via proxy" if proxy else "direct",
         "on" if docker else "off",
+        settings.llm.provider if agent else "off",
     )
     try:
         await dp.start_polling(bot, handle_signals=True)
@@ -99,6 +106,8 @@ async def run(settings: Settings) -> None:
             await docker.aclose()
         if checker:
             await checker.aclose()
+        if llm:
+            await llm.aclose()
         await engine.dispose()
         log.info("tgit stopped")